5-76
J21 Dew Condensation Prevention (Duty)
When the inverter is stopped, dew condensation on the motor can be prevented, by feeding DC
power to the motor at regular intervals to keep the temperature of the motor above a certain level.
To utilize this feature, you need to assign a terminal command (DWP) (dew condensation
prevention) to one of general-purpose digital input terminals (function code data = 39).
Enabling Dew Condensation Prevention
To enable dew condensation prevention, turn ON the condensation prevention command (DWP)
while the inverter is stopped. Then, this feature starts.
Dew Condensation Prevention (Duty) (J21)
The magnitude of the DC power applied to the motor is the same as the setting of F21 (DC
Braking, Braking level) and its duration inside each interval is the same as the setting of F22 (DC
Braking, Braking time). The interval T is determined so that the ratio of the duration of the DC
power to T is the value (Duty) set for J21.
(%) 100×
T
F22
(J21) prevention oncondensati forDuty =
Condensation Prevention Cycle
To Next Page
Loading...
